# McGraw Hill Must Know — user reviews

> 4 indexed App Store user reviews of McGraw Hill Must Know by McGraw-Hill, rated 4.10/5 from 11 ratings.

- Source: https://appshunter.io/ios/app/mcgraw-hill-must-know/id1469168846/reviews
- App overview in markdown: https://appshunter.io/ios/app/mcgraw-hill-must-know/id1469168846.md
- Rating breakdown: 5★ 7 · 4★ 1 · 3★ 1 · 2★ 1 · 1★ 1

## Most critical reviews (4 lowest-rated)

### 1/5 — Can’t play any audios in ESL for high school

*2023-08-04*

The audio players in Esl for high school don’t work at all. It’s showing an error. Please fix it

### 2/5 — Audio not working

*2022-11-28*

Audio files for “Must Know High School ESL” are corrupted and won’t play in this App.

### 3/5 — For geometry

*2023-12-10*

I bought a Must know geometry 2nd edition and the questions in the book are inconsistent to the must know app, which is kind of frustrating because I couldn’t check my answers perhaps ensure that my answers are correct.

In the other hand, the book is good way to start learning about chosen subjects and I recommend it for beginners.

### 5/5 — very helpful

*2020-12-10*

this app motivates me a lot to study. it has many subjects that you can study also, which turns out to be very useful for many of my classes

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-28.*